| 摘要 |
<p>A method of encoding position information (10) for a group of recording units on a recording medium having plurality of primary groups, with each primary group having N primary labels (40) and plurality of secondary groups, with each secondary group having M secondary labels (44). The primary labels (40) and secondary labels (44) are always in fixed sequence. The primary labels (40) and secondary labels (44) are combined such that for each position X, there is a unique combination of primary label and secondary label (11). Further, the value of Xth primary label (41) differs by the quotient of X/N from the value of corresponding secondary label of the secondary group (45) when the value of primary label is greater than or equal to the value of secondary label and the value of Xth primary label differs by M subtracted from the value of secondary label when the value of primary label is less than the value of secondary label.</p> |
